Doubt about lvl 3 - profession/job

I have been hesitant to raise myself to Level 3 despite having the requirements. Whilst studying, there was a message that read you may only work for 30 days in your profession once becoming Level 3, however, the requirements for level 4 include 80 points of labor. Each plank is 1 point, an ax is 2, a fishing rod 3. I am up to 18 now, but the most I could produce in 30 days is (plank, plank, fishing rod, repeat) 50 points.

What would happen if you do not finish 80 points within the 30 day limit? I pray it would not be required to study another profession.